RECON: TNO occultation with 145453

Event between (145453) 05RR43 and star GA1020:00517951 with event index number of 1025220

Geocentric closest approach at 2020/12/11 00:59:34 UTC

J2000 position of star is 04:39:55.3 +13:44:57
Equinox of date position of star is 04:41:06.1 +13:47:19
Stellar brightness G=15.0, use SENSEUP=128
Star is 139 degrees from the moon. Moon is 18% illuminated.
TNO apparent brightness V=20.0

TNO is 39.9 AU from the Sun and 38.9 AU from the Earth.
The TNO is moving 25.7 km/sec on the sky relative to the star, or, 3.3 arcsec/hr.
The 1-sigma error in the time of the event is 60 seconds.
The 1-sigma cross-track error in the shadow position is 1482 km.

The TNO has an absolute magnitude Hv=4.0
Diameter=955.0 km assuming a 5% albedo -- 37.1 sec chord
Diameter=389.9 km assuming a 30% albedo -- 15.2 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 
 
 

Star training set for 145453, (2020/12/11 01:00UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:07.5 +16:32:59  0.8  2.92 140
Bellatrix      05:26:15.3 +06:22:01  1.6 13.36 128
90 Tau         04:39:19.9 +12:33:05  4.3  1.31 140
PPM 120102     04:40:08.5 +14:08:44  8.3  0.43 139
PPM 120120     04:40:50.2 +13:42:38  9.5  0.10 139
145453         04:41:06.1 +13:47:19 15.0       139
Positions are for equinox of date

Azimuth is measured in degrees eastward from north. North is at an azimuth of 0, due East is at an azimuth of 90 degrees, due South is 180, and due West is 270.

Do not use the listing below for the RECON CPC 1100 telescopes. This is provided for other non-team facilities.

Star training set for 145453, (2020/12/11 01:00UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8  2.92 140
Bellatrix      05:25:07.8 +06:20:58  1.6 13.36 128
90 Tau         04:38:09.6 +12:30:39  4.3  1.31 140
PPM 120102     04:38:57.4 +14:06:20  8.3  0.43 139
PPM 120120     04:39:39.4 +13:40:15  9.5  0.10 139
145453         04:39:55.3 +13:44:57 15.0       139
Positions are for J2000

Event circumstances last updated at 2020/12/02 11:36:09 UT

Marc W. Buie, Southwest Research Institute

RECON